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xcontrol error /object reference invalid error/


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Hi all, I just started with Xcontrols. I am trying to create my own Listbox and I don't want to have all the properties code in "display state change" of Facade.vi. So I put a reference of the Listbox into State 1.vi because I thought that this way I could change the properties of the control in the property Vis. But I still get "Object reference is invalid" error. Why? I initialized the reference in "Exec state change". So Why? Thank a lot guys!

LV 8.5, WinXP

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